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Finding the Fourth Proportional to 638,618.70, 881,299.95 and 352,148.94

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Solution

The fourth proportional to 638,618.70, 881,299.95 and 352,148.94 is: 485,968.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,618.70 : 881,299.95 = 352,148.94 : x
  2. Step 2: Convert to fraction form
    638,618.70/881,299.95 = 352,148.94/x
  3. Step 3: Cross multiply
    638,618.70x = 881,299.95 × 352,148.94
  4. Step 4: Simplify right side
    638,618.70x = 310,348,843,214.55
  5. Step 5: Solve for x
    x = 310,348,843,214.55/638,618.70
  6. Step 6: Final answer
    x = 485,968.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.